Soil Organic Matter Management: The Roles of Residue Quality in C Sequestration and N Supply - Sustainable Management of Soil Organic Matter - page 97

Fig. 3.4. Modelled temporal variation derived from a single exponential decay model using
repeated applications of legume pruning at a rate of 75 kg N ha − 1 3 months − 1 . (a) Gliricidia sepium
with N mineralization rate constant k= 0.074 week − 1 and (b) Calliandracalothyrsuswith N mineral-
ization rate constant k= 0.015 week − 1 .
We recognize that this simplified model approach has limitations and
needs verification. However, it revealed potentially important long-term
implications of systems with different residue qualities in nutrient supply
patterns.